Abstract: Most digital image watermark method based on transformation region without resisting to geometric attack ability. This paper proposes a zero watermark algorithm resisting to rotation attack based on Radon transform. For rotation causing distortion, it makes use of Radon transform detection algorithm to correct the rotated images and detect whether the test image involves watermark or not, and extracts watermark. Experimental results demonstrate the method can obtain better visual effect, and it is robust to all kinds of rotation attacks and some mage degradation process such as adding noise, cropping, filtering and JPEG compression.

Key words: zero watermark, resisting to rotation attack, Radon transform, robustness

摘要： 针对大多数基于变换域的零水印算法无法抵抗几何攻击(RST变换)的缺陷，提出一种基于Radon变换的抗旋转攻击零水印算法。通过Radon变换检测算法对发生旋转几何攻击后的图像进行几何校正并提取水印。仿真实验结果证明，该算法可以获得良好的图像视觉效果，对旋转几何攻击及加噪、滤波、JPEG压缩、剪切攻击有较好的鲁棒性。

关键词: 零水印, 抗旋转攻击, Radon变换, 鲁棒性

CLC Number: 

• TP301.6